bedding plane

noun

noun

Geography, Geology, Natural sciences The planar surface between adjacent strata

Coal and petroleum do not occur hap-hazard in nature, but the aggregate occurrence of each product in any region forms a definite, limited horizon, which, in its continuance, is independent of the bedding plane.1940, William Plotts, Isogeotherm, Or Monist Theory of Stratified Mineral Occurrence and Origin, page 7:

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